Bose A20 Aviation Owner's guide - Page 6

Tab 8, 16 Tab 7, 15 Tab 6, 14 Tab 5, 13 Tab 4, 12 Tab 3, 11 Tab2, 10 English ADVISORIES Hearing safety The headset is intended for use with the Acoustic Noise Cancelling® mode turned on. Noise reduction and communications performance are reduced with Acoustic Noise Cancelling mode turned off. Volume control Make sure your aircraft communications system volume control is easily accessible. This control affects the strength of the communications signal coming into the headset. As pilot in command, you must be sure you can understand critical communications even with Acoustic Noise Cancelling mode turned off. In this case, you may need to turn up the aircraft communications system volume. Avoid setting the volume controls at levels high enough to impair your hearing during extended periods of headset use. Recognizing aircraft sounds With the headset's active and passive noise reduction, typical aircraft sounds (such as engines, propellers, warning alarms, and other sound sources) may not sound familiar. We strongly advise you to make sure you can hear and recognize these sounds when using the Bose® A20™ Aviation Headset while operating any aircraft. Using audio sources When listening to in-flight entertainment, or a portable audio source through a Bose A20 Aviation Headset, be sure to limit the volume to safe levels that do not interfere with your ability to hear informational sounds and warning alarms, such as stall warnings or gear up, while piloting. 2